don't treat 0x85 as whitespace

A byte value of 0x85 is not whitespace, we were conflating that with
U+0085 (UTF8: 0xc2 0x85).  This caused us to incorrectly treat valid
multibyte characters like U+88C5 (UTF8: 0xe8 0xa3 0x85) as whitespace.

src/util.h

@@ -317,12 +317,12 @@ GIT_INLINE(bool) git__isdigit(int c)
 
 GIT_INLINE(bool) git__isspace(int c)
 {
-	return (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' || c == '\v' || c == 0x85 /* Unicode CR+LF */);
+	return (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' || c == '\v');
 }
 
 GIT_INLINE(bool) git__isspace_nonlf(int c)
 {
-	return (c == ' ' || c == '\t' || c == '\f' || c == '\r' || c == '\v' || c == 0x85 /* Unicode CR+LF */);
+	return (c == ' ' || c == '\t' || c == '\f' || c == '\r' || c == '\v');
 }
 
 GIT_INLINE(bool) git__iswildcard(int c)